NOTE: The USR3453C has been discontinued. The Courier Lite 56K Business Modem (USR5686G-PRO) is the recommended replacement‡. The USR5686G-PRO does NOT support leased-line connections, Synchronous, or V.25 bis.
The USR® Courier® 56K Business Modem with V.Everything® and V.Everywhere® technology offers the perfect solution for both Out of Band Management of networks or Point of Sale applications. Many modems claim reliability, but few match the real-world performance of Courier modems. Even fewer offer the multitude of advanced business features found on this modem: global usage, Carrier Loss Redial, and Dial and Dialback Security. Remote management capabilities let you configure, set up, update or troubleshoot your modems from almost anywhere. Each Courier includes a VersaPower Kit - a 110V to 240V power supply that includes clip-on plugs for other regions, in addition a clip-on power cord adapter that can be used to make it an inline power supply is available in all Courier accessory kits. When failure is not an option, you need the world-class capabilities that only come from the top of the USR product line.
Form Factor External - Serial
OS Compatibility Windows, Linux
Regional Compatibility Global
Product Code: USR3453C
US Availability: Discontinued, Recommended Replacement‡: USR5686G-PRO
Phone Pre-Sales: 877.710.0884
Courier Accessory Kits are available for online purchase below. For additional information contact Kim Mason at 847.87.2370 or send us an email.
USR3453C-ACC VersaPower Kit (Universal power adapter) automatically handles global power variations from 100 V to 240 V and includes alternate plugs for use in other regions (N.A., Europe, the Middle East or Africa). Kits are available for additional regions.
Product Code: USR3453C-ACC
US Availability: Contact Us
Visit the Global Country Approvals & Accessory Kit Guide to view current country approvals and appropriate accessory kits. The Courier Business Modem is approved for use in over 75 countries!
USR013453A-ACC: UK phone adapter + UK power cord + Dongle + IEC C8 adaptor
USR043453A-ACC: UK phone adapter + Loopback + Dongle + Australian power cord + IEC C8 adaptor
USR053453A-ACC: Loopback + Korean power cord + IEC C8 adaptor + Argentina power clip + Brazil power cord
USR243453A-ACC: Germ,Ital,French phone adapter + Euro power cord + Loopback + Dongle + IEC C8 adaptor (USR563453A-ACC Alternative kit)
USR563453A-ACC: Loopback + Dongle + Euro power cord + IEC C8 adaptor
USR723453A-ACC: UK phone adapter + India/SouthAfrica power cord + IEC C8 adaptor
USR3453CIEC-ACC: AC power cord C14 to C7 + IEC C8 adaptor
** Support for 64 bit operating systems requires a driver update (available in the support section of this website).
* Capable of receiving at up to 56 Kbps and sending at up to 48 Kbps (or 31.2 Kbps with V.90 server). Due to FCC regulations on power output, receiving speeds are limited to 53.3 Kbps. Actual speeds may vary. V.92 and V.90 features require compatible phone service and support from your Internet Service Provider (ISP). USRobotics modems featuring V.92 enhancements are backward compatible and will negotiate the highest possible speed when connecting to an ISP.
† Requires Windows operating system.
‡ Courier Lite (USR5686G-PRO) is the recommended replacement for Courier USR3453C, but features and specifications do vary. It is suggested to verify requirements before purchasing replacement units.